Fuel-pump drive



Patented Oct. 29, 1929 UNITED STATES HARRY S.

PATENT OFFICE GOLDEN, OF FLINT, MICHIGAN, ASSIGNORTO GENERAL MOTORS CORIORA- TION, F DETROIT, MICHIGAN, A CORPORATION OF DELAWARE FUEL-rum? DRIVE Application filed March 12, 1928. Serial No. 261,145.

This invention relates to a power transmitting means intended more particularly for operating a fuel pump of an internal combustion engine.

The invention has sion for power transmitting means permitting a driven mechanism to be conveniently 4 located at a distance from the source of power which is to operate its movable parts. More specifically,- the invention provides for the convenient operation of a fuel pump when positioned on that side of the engine remote from the cam shaft which is used to operate it.

Another object is to locate the fuel pump in a position removed from'the generator and starting motor to thereby7 prevent the possibility of the ignition of any fuel which might leak from the pump by sparks from the generator or motor.

Another object of the invention is. to provide for the location of the fuel pump onthat side of the engine which is comparatively free from engine accessories.

`The objects of the invention also include Y simplicity in construction andl economy in manufacture. Other objects and advantages will be understood from the following speciication and the accompanying drawing.

In the drawing:

Figure 1 is a transverse section through an internal combustion engine embodying an improvement in accordance with this invention; and Y t v Figure 2 is a bottom plan view of a detail used with the invention.

Referring by 'reference characters to the drawing, numeral 3 is used to designate an engine block mounted upon a crankcase 5. Numeral 7 is a pan secured to the crankcase by fastening means 9. Numeral 11 is the conventional crankshaft mounted in a half bearing 13 and a removable cap 15, as usual. The camshaft 17 has a cam 19 added thereto for operating the fuel pump: At 21 is` an air cleaner of any preferred form mounted over an opening 23 in the crankcase.

Secured to the side wall 25 of the cranki case by anv suitable fastening means-is a fuel pump designated as an entirety by numeral 27. The fuel pump has near its base and on oneside `an opening 29 registering with an opening 31 in the wall 25 whereby the operating means for the pump may be accommov dated. for its object the provi- The inventionis not concerned with the details of the' pump, per se. The pump is, however, of the variable stroke type having an operating plunger 33 which isat times pulled i down to effect a suction stroke. Pivoted at 35 adjacent the opening is a bell crank lever having a horizontal arm 37 projecting outwardly and normally pressed up- Wardly by a coil spring 39, a cap 41 secured to the bottom of the pump housing and forming a lower abutment for the spring. Articulated links 43 and 45 pivotally connect the plunger 33 with the end of horizontal arm 37. These links are constructed to approach, but not to reach, alignment and when lever 37 is rotated clockwise it operates 'to pull plunger rod 33 through the instrumentality of links 43 and 45, and create a suction stroke in the variable volume chamber of the pump. A spring 47, positioned as shown in the drawing, may create a compression stroke, but being resilient operates against the fiuid pressure in the pump chamber. It therefore produces such a stroke only when the resistance of the fluid in the chamber permits. If the chamber is full and the communication with the. carburetor affords no relief, spring 47 is unable to force the iuid out of the chamber and through the usual outletl valve. The pump valves are of any preferred type and access to these valves is had by plugs 51. The action of the pump is Well known and need not be further described.

Beneath the top wall of the crankcase is secured a bracket 51 by fastening means 53. This bracket has bearings 55 and 57 in alignment for slidably carrying a rod 59. The rod engages at one end a vertical arm 61 formed in Figure 1. The spring 39 operates to push lagainst the bell crank and' hold rod 59 at all times against the cam. When the spring 39 is moving bell crank upwardly, the spring 47 may execute a discharge stroke, in which 100 case the links 43. and 45 do not collapse. If,

however, the 'pressurefin the pump chamber balances the pressurevof spring 47, no discharge stroke occurs and the links 43 and 45 collapsein a manner which is well known in this type of pump. f

The arrangement described permits the location of the pump on 'that side of the engine which, in the case of theengine for which it has been especially designed, is comparatively free from engine accessories. It also permits the pump to be located away lfrom the danger of sparks from the motor or generator. It providesa simple and economical arrangement for actuating the pump by the simple provision of a reciprocating rod extending transversel of the crankcase and above the cranksha t.

I claim: l 1. In combination, an internal combustion engine, an accessory having a driven part, the accessory located at one side of the engine, a source of power adjacent the other side of the engine, means mounted for axial reciprocation transversely of said engine and ter minally engaging said power source and driven part.

2. In combination, an internal combustion engine, a longitudinally extending camshaft adjacent one side of said engine, a fuel pump adjacent the other side of saidengine, said pump having means to operate the same, a rod mounted for movement along its-longitudi- .nal axis transversely yof said engine, engaging said camshaft and movably engaging the pump operating means. l

3. In combination, an internal combustion engine, a crankcase therefor, a crankshaft positioned mediallytherein, a parallel camshaft adjacent one side thereof, a fuel pum adjacentl the other side of said engine, sai

pump having an actuating lever, an axially reciprocating rod positioned transversely of the engine and Amovably engaging a cam on the camshaft andan arm on the lever.

4. In `combination, an internal combustion engine having a crankshaft and a parallel camshaft, a brackety carried by said engine having aligned bearings, a rnd reciprocably mounted in said bearings within the crankcase,-transversely of the engine, and terminally engaging the cam, a fuel pump on the side of said engine remote from the camshaft, said pump having a movable operatingI part, and said reciprocating rod engaging said operating part. n

45. The invention defined by claim 4, together with a spring in said pump Lengaging 'said operating part and effective to hold the reciprocatin rod in contact with thecam on the cams aft.

In testimony whereofI-alix my signature. i

HARRY s. GOLDEN. 

